Process of making trichloroisopropyl alcohol.



- UNITED STATES Patented October 27, 1903.

PATENT OFFICE.

FRITZ I-IOFMANN AND OTTO BONI'IOEFFER] OF ELBERFELD, GERMANY, ASSIGNORS TO FARBENFABRIKEN OF ELBERFELD 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PROCESS OF MAKING, TRICHLOROISOPROPYL ALCOHOL.

SPECIFICATION forming part of Letters Patent No. 742,430, dated October 27, 1903.

Application filed J une 1,1903. Serial No. 159,697. (No specimens.) 7

To all whom it may concern.-

Be it known that we, FRITZ HOFMANN and OTTO BONHOEFFER, doctors of philosophy, chemists, residing at Elberfeld, Germany, (assignors to the FARBENFABRIKEN OF EL- BERFELD COMPANY, of New York,) have invented a new and useful Improvement in Processes of Making Trichloroisopropyl Alcohol, of which the following in a specification.

We have found a new and valuable process for the production of the trichloroisopropyl alcohol having the formula which body, according to our researches, possesses valuable therapeutic, especially soporific, properties.

Our new process for producing this compound consists in first allowing chloral to act on the additional products which can be pre- OH. OH,

pared by the action of a methyl haloid and an ethere. g., ethyl ether on magnesium-- and then decomposing the resulting halogenmagnesium compound of trichloroisopropyl alcohol having the formula Ol-I. O.Mg.halogen OH sium dissolves, the production of the additional compound having the formula being the result. The solution thus obtained is then slowly added to a mixture of 147.5 parts of chloral (free from water) and three hundred parts of other (free from water and alcohol) while cooling and stirring. After the reaction is finished the bromomagnesiumcompound of trichloroisopropyl alcohol'is dccomposed by the addition of ice water. A suitable quantity of a dilute acid is preferably added in order to dissolve the magnesium oxid precipitated during the decomposition. The ethereal solution which contains the trichloroisopropyl alcohol is dried, the other is distilled 0E, and from the remaining oil the trichloroisopropyl alcohol is isolated by a distillation in vacuo. It has the melting-point of 48 to 49 centigrade and can be further purified by a recrystallization from other or ligroin.

Having now described our invention and in what manner the same is to be performed, what we claim as new, and desire to secure by Letters Patent, is-

The herein-described process for the production of trichloroisopropyl alcohol having the above-given formula which process consists in forming an addition compound from a methyl haloid, an ether and magnesium, then reacting with this compound on chloral; secondly decomposing the resulting halogenmagnesium compound and finally isolating thetrichloroisopropyl alcohol thus obtained, substantially as hereinbefore described.

Intestimony whereof we have signed our names in the presence of two subscribing wit nesses.

FRITZ HOFMANN. OTTO BONHOEFFER.

Witnesses:

OTTO KONIG, J. A. RITTERSHAUS. 

